Why won't my volume work?

[AC Question]

So the volume on my phone will only work when I have headphones in. No phone calls or notification sounds or music. I've tried restarting my phone and clearing RAM applications and still no resolve.

 

[B. Diddy]

I think this is a duplicate--see response here: http://forums.androidcentral.com/ask-question/535240-volume-stuck-muted.html. Thread closed.